President Obama has stepped up his rhetoric against the health care system, but fiscal deficiencies in his plan for a government take over have become increasingly apparent in recent weeks. Now, some on Capitol Hill are toying with the idea of taxing employee health benefits to subsidize the cost of government-provided care. But, as Americans learned during the collapse of GM, many union labor agreements provide extremely generous benefit packages to workers who are unlikely to support any proposal that might put their compensation at risk.